Ultimately you want to convert a website Wordpress into Shopify, No worries I will add all functionalities and if you want then I will change the design as well or make a similar design like your existing wordpress website.
My Approach will be :
1. First I will design the PSD as per your existing wordpress.
2. Then later converting into shopify.
3. Using some plugins if needed.
well, I have a small but professional team so I have no fear about any web development task:
Team has very talented in all technology stacks:
✔ Nodejs, Angularjs, Reactjs, Vuejs, Emberjs and coffee script
✔ Android, IOs, Objective C, Swift , Hybrid, native
✔ Laravel, Codeigniter, Yii, Cake PHP, WordPress, Open-cart
✔ MYSQL, MYSQLI, MMSQL, MongoDB, Dynamodb, Aurora
✔ Payment Gateway
✔ Google Apis, Rest full APIs
Could you please come for more discussion.
Warm Regards
AR~